ios 中数组，字典 集合类型的几种常用枚举方法

http://blog.csdn.net/jidiao/article/details/8138665

NSMutableArray *array=[[NSMutableArray alloc]initWithObjects:@"apple",@"ab",@"aa",@"aac",@"appd", nil];

//排序

[array sortUsingComparator:^NSComparisonResult(__strong id obj1,__strong id obj2){

NSString *str1=(NSString *)obj1;

NSString *str2=(NSString *)obj2;

return [str1 compare:str2];

}];

NSLog(@"array=%@",array);



//枚举字典

NSNumber *age=[NSNumber numberWithInt:51];

NSDictionary *dic=[[NSDictionary alloc]initWithObjectsAndKeys:@"Anthony",@"FirstName",@"Robbins",@"LastName",age,@"age", nil];

[dic enumerateKeysAndObjectsUsingBlock:^(__strong id key,__strong id value,BOOL *stop){

NSLog(@"Key=%@,Value For Key=%@",key,value);

}];



//法二

NSEnumerator *keys=[dic keyEnumerator];

id keyInDic=nil;

while ((keyInDic =[keys nextObject])!=nil) {

id valueForKey=[dic objectForKey:keyInDic];

NSLog(@"Key=%@,ValueForKey=%@",keyInDic,valueForKey);

}



//NSSet

NSString *hisName=@"li";

NSString *hisLastname=@"san";

NSString *herName=@"zhang";

NSString *herLastname=@"san";

NSMutableSet *set=[[NSMutableSet alloc]initWithObjects:hisName,hisLastname,herName,herLastname, nil];

NSLog(@"%@",set);



//删除对象

[set removeObject:herLastname];

NSLog(@"%@",set);



//添加

[set addObject:hisLastname];

NSLog(@"%@",set);



[set addObjectsFromArray:array];

NSLog(@"%@",set);



//遍历set

[set enumerateObjectsUsingBlock:^(__strong id objc1,BOOL *stop){

if ([objc1 isKindOfClass:[NSString class]]) {

NSString *str=(NSString*)objc1;

if ([str isEqualToString:@"san1"]) {

NSLog(@"find san in set");

*stop=YES;

}

}

}];



//set anyObject

NSLog(@"set anyObject:%@",[set anyObject]);//返回一个任意的set值

NSLog(@"set allObject:%@",[set allObjects]);//遍历所有